Sewing-machine shuttle



(No Model.)

T. J. HOLTON.

Sewing Machine Shuttle.

No. 233,760. Patented Oct. 26,1880.

IVITNESSES. INVENTOR N.PETER$. PHDTO-LITHOGRAPHER, WASHINGTON. B C.

THOMAS J. HOL'ION, OF PHILADELPHIA, PENNSYLVANIA.

SEWING-=MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 283,760, dated October 26, 1880.

Application filed May 13, 1880. (No model.)

1 To all whom it may concern Be it known that I, THOMAS J. BOLTON, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sewing-Machine Shuttles, of which the following is a specification, reference being bad to the annexed drawings, wherein Figure l is a side elevation of a shuttle embodying my improvements. Fig.2 is a vertical transverse section on line 1 1, Fig. 1. Fig. 3 is a side elevation of the interior cylinder of the shuttle. Fig. A is a sideelevation of a shuttle, illustrating a modification of my improvements. Fig. Sis a transverse vertical section on line 2 2, Fig. 4; and Fig. 6 is a side elevation of the interior cylinder of shuttle, shown in Fig. 4..

My invention has relation to the improved shuttle for sewing-machines shown and described in Letters Patent of the United States, dated October 9, 1877,No.196,018; and the object of my present improvement is to provide means for maintaining the tension of the bobbin-thread when secured by the revolution of the inner shuttle-cylinder.

Said improvement consists, essentially, in the combination, with the shuttle-cylinders, of a pawl and ratchet for preventing the backward rotation of the inner cylinder.

It still further consists, specifically, in so constructing and combining the parts that the spring thread-guide on the outer shuttle shall engage with and operate as a pawl upon the milled periphery of the inner cylinder, as hereinafter fully set forth.

Referring to the annexed drawings, A indicates the outer, and B the inner, cylinder of a shuttle constructed substantially in accordance with the terins and description of the aforesaid Letters Patent, and which need not, therefore, be more specifically described.

0 is a spring thread-guide on the outer cylinder, such thread-guide, as a guide, having been used prior to the grant of said Letters Patent, and not, therefore, shown or claimed therein.

B represents the closed end of the inner cylinder, B, made with a milled periphery, b, which facilitates the turning of said inner cylinder by affording a roughened grasping-surface.

G is a toe on the free end of the guide G, which passes through an opening, a, in the outer cylinder, A, so as to engage with the milled periphery b, the guide and said milled part thus forming a pawl and ratchet. The thread-guide G is secured to the outer cylinder, A, by a rivet, c.

Instead of producing an engagement of the toe, O, with the ratchet b, a ratchet, B may be formed on the inner cylinder, B, by milling it at or near its open end, as shown in Fig. 6, in line with the rivet (1. As this end of the cylinder B is springy or resilient the rivet at will operate as a pawl or dog, the effect produced being substantially the same as that achieved by the engagement of the toe of the guide with the milled part b. In both cases the inner cylinder, when duly adjusted to secure the proper tension of the bobbin-thread, will be prevented from rotating backward] y to destroy or impair such tension.

Vhat I claim as my invention is 1. The combination, with ashuttle composed of two cylinders, which telescope or slide one into the other, of a pawl or dog and ratchet, whereby to prevent the backward rotation of the inner-cylinder, substantially as shown and described.

2. In combination with the cylinder A, carrying the spring thread-guide 0, provided with toe O, the inner cylinder, B, having a milled periphery or ratchet, b, said parts being constructed and designed for operation substantially as described, to secure the engagement of said guide as a pawl with the ratchet b, and thereby to prevent the backward rotation of the inner within the outer cylinder, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 3d day of May, 1880.

THOS. J. HOLTON.

Witnesses:

H. 1?. Rooms, A. J. LECHLER. 

